Interface management in wireless communication system using hybrid time reuse

• US 9,288,814 B2
• Filed: 06/17/2014
• Issued: 03/15/2016
• Est. Priority Date: 11/27/2007
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Yavuz, Mehmet, Black, Peter, Nanda, Sanjiv
• Primary Examiner(s): Wong, Warner
• Application Number:
  US14/307,382
• Publication Number:
  US 20140376520A1
• Time in Patent Office: 637 Days
• Field of Search: 370/314, 370/336, 370/338, 370/345, 370/395.4, 370/442, 370/458, 370464-465, 370/468, 370/498
• US Class Current: 1/1
• CPC Class Codes: H04L 1/1825 Adaptation of specific ARQ protocol parameters according to transmission conditions
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/20 using error rate
• CPC Class Codes: H04W 52/244 Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
• CPC Class Codes: H04W 52/32 TPC of broadcast or control channels
• CPC Class Codes: H04W 52/322 Power control of broadcast channels
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/38 TPC being performed in particular situations
• CPC Class Codes: H04W 52/44 in connection with interruption of transmission
• CPC Class Codes: H04W 56/001 Synchronization between nodes
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others
• CPC Class Codes: H04W 56/0025 synchronizing potentially movable access points
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02

Abstract

Interference that occurs during wireless communication may be managed by hybrid time reuse. A method, apparatus amend medium of communication determines one or more time reuse patterns of respective one or more unplanned access points. A second time reuse pattern that is less interfering with the one or more time reuse patterns is selected. Signals are transmitted according to the second time reuse pattern from a second unplanned access point to an associated access terminal.

Claims

1. A method of communication, comprising:

measuring signals from a macro cell and one or more neighboring femto cells;

identifying a hybrid automatic repeat request (HARQ) interlace that exhibits the least interference;

identifying a subframe based on the identified HARQ interlace;

determining one or more time reuse patterns of the one or more neighboring femto cells;

selecting a second time reuse pattern that is less interfering with the one or more time reuse patterns; and

transmitting signals according to the second time reuse pattern from a second femto cell to an associated user equipment.

2. The method of claim 1, further comprising identifying a primary femto channel based at least in part on the identified subframe.

3. The method of claim 1, wherein transmitting signals comprises transmitting signals on a primary femto channel.

4. The method of claim 1, further comprising establishing time synchronization at the second femto cell with a macro cell.

5. The method of claim 1, further comprising transmitting on pilot channels corresponding to the one or more time reuse patterns.

6. An apparatus for communication, comprising:

an interference controller configured to;

measure signals from a macro cell and one or more neighboring femto cells,

identify a hybrid automatic repeat request (HARQ) interlace that exhibits the least interference,

identify a subframe based on the identified HARQ interlace,

determine one or more time reuse patterns of the one or more neighboring femto cells, and

select a second time reuse pattern that is less interfering with the one or more time reuse patterns; and

a communication controller configured to transmit signals according to the second time

reuse pattern from a second femto cell to an associated user equipment.

7. The apparatus of claim 6, wherein the interference controller is further configured to identify a primary femto channel based at least in part on the identified subframe.

8. The apparatus of claim 6, wherein transmitting signals comprises transmitting signals on a primary femto channel.

9. The apparatus of claim 6, wherein the interference controller is further configured to establish time synchronization at the second femto cell with a macro cell.

10. The apparatus of claim 6, wherein the communication controller is further configured to transmit on pilot channels corresponding to the one or more time reuse patterns.

11. An apparatus for communication, comprising:

means for measuring signals from a macro cell and one or more neighboring femto cells;

means for identifying a hybrid automatic repeat request (HARQ) interlace that exhibits the least interference;

means for identifying a subframe based on the identified HARQ interlace;

means for determining one or more time reuse patterns of the one or more neighboring femto cells;

means for selecting a second time reuse pattern that is less interfering with the one or more time reuse patterns; and

means for transmitting signals according to the second time reuse pattern from a second femto cell to an associated user equipment.

12. The apparatus of claim 11, further comprising means for identifying a primary femto channel based at least in part on the identified subframe.

13. The apparatus of claim 11, wherein the means for transmitting signals comprise means for transmitting signals on a primary femto channel.

14. The apparatus of claim 11, further comprising means for establishing time synchronization at the second femto cell with a macro cell.

15. The apparatus of claim 11, further comprising means for transmitting on pilot channels corresponding to the one or more time reuse patterns.

16. A non-transitory computer-readable medium comprising codes for causing a computer to:

measure signals from a macro cell and one or more neighboring femto cells;

identify a hybrid automatic repeat request (HARQ) interlace that exhibits the least interference;

identify a sub frame based on the identified HARQ interlace;

determine one or more time reuse patterns of the one or more neighboring femto cells;

select a second time reuse pattern that is less interfering with the one or more time reuse patterns; and

transmit signals according to the second time reuse pattern from a second femto cell to an associated user equipment.

17. The non-transitory computer-readable medium of claim 16, further comprising codes for causing the computer to identify a primary femto channel based at least in part on the identified subframe.

18. The non-transitory computer-readable medium of claim 16, wherein the codes for causing the computer to transmit signals comprise codes for causing the computer to transmit signals on a primary femto channel.

19. The non-transitory computer-readable medium of claim 16, further comprising codes for causing the computer to establish time synchronization at the second femto cell with a macro cell.

20. The non-transitory computer-readable medium of claim 16, further comprising codes for causing the computer to transmit on pilot channels corresponding to the one or more time reuse patterns.